Biallelic inactivation of the RIZ1 gene in human gastric cancer

Yutaka Tokumaru, Shuji Nomoto, Carmen Jerónimo, Rui Henrique, Susan Harden, Barry Trink, David Sidransky

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


The distal short arm of chromosome 1 is commonly deleted in a variety of human neoplasms including gastrointestinal cancer. Genetic alterations of the retinoblastoma protein-interacting zing-finger gene (RIZ)1 including loss of heterozygosity (LOH) at 1p36, frameshift mutations, and promoter hypermethylation were reported previously in several cancers. In this study, we evaluated RIZ1 in 30 primary gastric cancers and found frameshift mutations in two cases (6.7%). Moreover, using real-time quantitative methylation-specific PCR, methylation of the RIZ1 promoter was detected in 11 (37%) cases. In all 11 cases with methylation, inactivation of the second allele occurred through frameshift mutation, LOH or promoter methylation. Our results suggest that RIZ1 is a specific target of inactivation in human gastric cancer.

Original languageEnglish (US)
Pages (from-to)6954-6958
Number of pages5
Issue number44
StatePublished - Oct 9 2003


  • Gastric cancer tumor suppressor gene
  • Gene silencing
  • Hypermethylation
  • RIZ1

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research


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